US12325110B2ActiveUtilityA1
Impact contact surface shape of an impact wrench
Est. expiryNov 17, 2040(~14.3 yrs left)· nominal 20-yr term from priority
H02K 5/04H02K 9/06H02K 11/30B25B 21/02B25B 21/023
37
PatentIndex Score
0
Cited by
4
References
10
Claims
Abstract
An impact contact surface shape of an impact wrench. The impact wrench comprises a rotary shaft that acts on the workpiece and an impact block sleeved on the rotary shaft to drive the rotary shaft to rotate. One end of the rotary shaft is at least configured with a stopping block to collide with the impact block. The impact block is at least configured with a locking block to collide with the stopping block. The impact contact surface comprises: at least one first contact surface located on the stopping block to contact and press the locking block and at least one second contact surface located on the locking block to contact and press the first contact surface. The first contact surface and the second contact surface are intermeshing arc shapes or cycloid shapes.
Claims
exact text as granted — not AI-modifiedWe claim:
1. An impact contact surface shape of an impact wrench,
wherein the impact wrench comprises a rotary shaft ( 1 ) that acts on a workpiece and an impact block ( 2 ) sleeved on the rotary shaft ( 1 ) to drive the rotary shaft ( 1 ) to rotate, one end of the rotary shaft ( 1 ) is at least configured with a stopping block ( 3 ) to collide with the impact block ( 2 ), the impact block ( 2 ) is at least configured with a locking block ( 4 ) to collide with the stopping block ( 3 );
the impact contact surface comprises: at least one first contact surface ( 31 ) located on the stopping block ( 3 ) to contact and press the locking block ( 4 ) and at least one second contact surface ( 41 ) located on the locking block ( 4 ) to contact and press the first contact surface ( 31 ), wherein the first contact surface ( 31 ) and the second contact surface ( 41 ) are mutually engaged in a cycloid-shaped contact, the cycloid has two different cases,
epicycloid
:
{
X
=
(
R
1
+
r
a
)
sin
θ
-
r
a
sin
(
R
1
+
r
a
r
a
θ
)
Y
=
(
R
1
+
r
a
)
cos
θ
-
r
a
cos
(
R
1
+
r
a
r
a
θ
)
hypocycloid
:
{
X
=
(
R
1
-
r
b
)
sin
∅
-
r
b
sin
(
R
1
-
r
a
r
a
∅
)
Y
=
(
R
1
-
r
b
)
cos
∅
-
r
b
cos
(
R
1
-
r
b
r
b
∅
)
where:
R 1 is the base circle radius,
r a is the external circle radius,
r b is the internal circle radius.
2. The impact contact surface shape of an impact wrench defined in claim 1 , the stopping block ( 3 ) is formed with two symmetric first contact surfaces ( 31 ), and a first transitional surface ( 32 ) is formed between the two first contact surfaces ( 31 ) and connecting to the two first contact surfaces ( 31 ).
3. The impact contact surface shape of an impact wrench defined in claim 2 , wherein one end of the rotary shaft ( 1 ) is configured with two stopping blocks ( 3 ), and the two stopping blocks ( 3 ) are centrosymmetric in relation to the central axis of the rotary shaft ( 1 ); the first transitional surface ( 32 ) is a cambered surface or a curved surface.
4. The impact contact surface shape of an impact wrench defined in claim 3 , wherein a junction between the first contact surface ( 31 ) and the rotary shaft ( 1 ) is formed with a first arc-shaped transitional surface or a first curved transitional surface ( 33 ).
5. The impact contact surface shape of an impact wrench defined in claim 4 , wherein the rotary shaft ( 1 ) comprises a main body ( 11 ) that acts on the workpiece and a flange ( 12 ) formed on the other end of the main body ( 11 ) and placed inside a chamber ( 23 ) of the impact block ( 2 ), the stopping block ( 3 ) is formed on the flange ( 12 ), the first arc-shaped transitional surface or the first curved transitional surface ( 33 ) is formed on the junction between the flange ( 12 ) and the stopping block ( 3 ).
6. The impact contact surface shape of an impact wrench defined in claim 1 , wherein the locking block ( 4 ) is formed with two symmetric second contact surfaces ( 41 ), and a second transitional surface ( 42 ) is formed between the two second contact surfaces ( 41 ) and connected to the two second contact surfaces ( 41 ).
7. The impact contact surface shape of an impact wrench defined in claim 6 , wherein the impact block ( 2 ) is configured with two locking blocks ( 4 ), and the two locking blocks ( 4 ) are centrosymmetric in relation to the central axis of the impact block ( 2 ); the second transitional surface ( 42 ) is a cambered surface or a curved surface.
8. The impact contact surface shape of an impact wrench defined in claim 7 , wherein the impact block ( 2 ) comprises a seat body ( 21 ) and connecting blocks ( 22 ) formed on the seat body ( 21 ) and connected to the two locking blocks ( 4 ), there are two symmetrically configured connecting blocks ( 22 ), which are connected with the two locking blocks ( 4 ) to form a chamber ( 23 ) to house the stopping block ( 3 ), the connecting block ( 22 ) is arc-shaped or curved, and is formed with a second arc-shaped transitional surface or a second curved transitional surface ( 24 ) at the position in conjunction with the second contact surface ( 41 ).
9. The impact contact surface shape of an impact wrench defined in claim 1 , wherein the first contact surface ( 31 ) and the second contact surface ( 41 ) are in intermeshing logarithmic spiral shapes.
10. The impact contact surface shape of an impact wrench defined in claim 9 , wherein the rotary shaft ( 1 ) is configured with a base plate ( 13 ) to load the stopping block ( 3 ), the base plate ( 13 ) is located at one end of the rotary shaft ( 1 ), the stopping block ( 3 ) is formed on the base plate ( 13 ).Join the waitlist — get patent alerts
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